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https://issues.apache.org/jira/browse/TAP5-1329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13129143#comment-13129143
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Hudson commented on TAP5-1329:
------------------------------

Integrated in tapestry-trunk-freestyle #578 (See 
[https://builds.apache.org/job/tapestry-trunk-freestyle/578/])
    TAP5-1329: Tapestry allows a template to define the same extension-point id 
twice, which causes difficult to understand duplicate component id exceptions

hlship : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1185348
Files : 
* 
/tapestry/tapestry5/trunk/tapestry-core/src/main/java/org/apache/tapestry5/internal/services/SaxTemplateParser.java
* 
/tapestry/tapestry5/trunk/tapestry-core/src/test/java/org/apache/tapestry5/internal/services/TemplateParserImplTest.java
* 
/tapestry/tapestry5/trunk/tapestry-core/src/test/resources/org/apache/tapestry5/internal/services/dupe_extension_point_id.tml

                
> Tapestry allows a template to define the same extension-point id twice, which 
> causes difficult to understand duplicate component id exceptions
> ----------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: TAP5-1329
>                 URL: https://issues.apache.org/jira/browse/TAP5-1329
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: tapestry-core
>    Affects Versions: 5.2.2
>            Reporter: Howard M. Lewis Ship
>            Assignee: Howard M. Lewis Ship
>             Fix For: 5.3
>
>
> Probably dates back to 5.1.
> If the parent template looks like:
> <t:extension-point id="foo"/> ... <t:extension-point id="foo"/> ...
> and the child template extends:
> <t:replace id="foo"> <t:form t:id="myForm"> ... </t:replace>
> then the exception is that myForm is a duplicate embedded component id.
> Effectively, Tapestry has "pasted" the <t:form ...> into two places of the 
> parent template.
> Tapestry should have thrown an exception when parsing the parent template.

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